Elastomer-coated or metal rotors matched to the original profile, shaft fit, and specified clearances.
Include: rotor profile, known material, quantity, and any swelling, scoring, or flow-loss symptoms.
Identify the pump. Match the replacement.
Rotary Lobe Pump Parts & Wear Components
Find matching rotors, mechanical seals, wear plates, liners, and sealing kits. Start with the pump serial number and the parts you need; add wear symptoms if a replacement has failed repeatedly.
1. Identify Your Pump
Replacement parts must match the original pump build, including rotor material, shaft dimensions, running clearances, and seal arrangement. A model name alone may not identify every supplied option.
Quote the Type, Series, and No. fields from the nameplate where available. If the plate is unreadable or missing, describe the pump and the required part so we can clarify the identification details.
2. Main Wear Parts
Match the part to the serial number, material, and supplied configuration. Wear plates and radial liners are configuration-dependent; confirm what is fitted before ordering.
Seal faces, O-rings, seats, and sleeves matched to the supplied seal arrangement.
Include: leakage location, fluid, temperature, and any dry-running or repeated-leakage history.
Where fitted, these protect the front-cover and gear-side surfaces from axial wear.
Include: plate location, quantity, and photographs or measurements of scoring and wear.
Where fitted, these provide replaceable wear surfaces around the casing bore.
Include: liner position, quantity, and the condition of the mating rotors and casing.
For compatibility, see Materials →. For removal and replacement, use the Maintenance Guide →
3. Hardware, Sealing Kits & Tools
Small parts and service tools should be identified alongside the main wear items. Quote the part code or describe its location if the name is uncertain.
| Part Group | Examples | Ordering Details |
|---|---|---|
| Retention hardware | Lock nuts, lock washers, and rotor keys | Match shaft size and the original retention arrangement. |
| Sealing kits & small parts | O-rings, cover gaskets, seal seats, sleeves, and plugs | Confirm dimensions, fluid and cleaning compatibility, and fitted location. |
| Service tools | Rotor puller and assembly sleeve | Specify the pump model and intended service task. Tools are ordered separately from wear parts. |
Retention hardware
- Examples
- Lock nuts, lock washers, and rotor keys
- Ordering Details
- Match shaft size and the original retention arrangement.
Sealing kits & small parts
- Examples
- O-rings, cover gaskets, seal seats, sleeves, and plugs
- Ordering Details
- Confirm dimensions, fluid and cleaning compatibility, and fitted location.
Service tools
- Examples
- Rotor puller and assembly sleeve
- Ordering Details
- Specify the pump model and intended service task. Tools are ordered separately from wear parts.
04 / Spare Parts Request
Request Matched Spare Parts
Tell us which pump and parts you need. If the serial number is unknown, leave it blank and describe the pump in the notes. We will clarify the identification before confirming supply.
Related guides
Plan the Repair, Not Just the Replacement
Use these guides for service preparation, repeat-failure diagnosis, and material checks.
Replacement Procedures
Review rotor, seal, and wear-part service instructions before planning the repair.
Repeat-Failure Diagnosis
Check the operating symptoms if the same part keeps wearing or leaking.
Material Compatibility
Recheck materials when the process fluid, temperature, or cleaning conditions have changed.